Carl Valentin COMPA II, Service Manual

Page: 29 / 66

Compa II series Adjustments, settings and alignments
11.15 Service instructions 29
6.3 Measuring the torques at the internal rewinder
Measurement of the winding torque at the internal rewinder occurs by
determining the pulling forces with a cord wrapped around the
rewinder. Measurement occurs without a test collar.
The physical relation between the torque and the pulling force is:
F = M / r
F = traction [N]
M = rewind torque [Ncm]
r = radius of test collar (20 mm)
Compa II 104,
Compa II 106:
M
Auf
= 28 - 32 Ncm F
Auf
= 14 - 16 N
Compa II 162:
M
Auf
= 36 - 44 Ncm F
Auf
= 18 - 22 N
Figure 18
1. Unplug the printer from the electrical outlet and remove the rear
cover.
2. Remove the label media from the printer.
3. Push the cord (2) under a bracket of the internal rewinder (3) and
wind it around the rewinder.
4. Secure spring scale [25 N] (1) at the end of the cord.
5. Move the spring scale (1) upward vertically until the winder begins
turning.
6. If the drive belt is also moving, hold it in place during the
measurement. Otherwise, the measurement is not accurate.
7. Allow the cord to unwind from the test collar at least one full turn
and read the pulling force F on the spring scale at the same time.
8. Determine the pulling force in the same manner, except in the
opposite rotation direction (4).
If the winding torque differs from the setpoint, it must be adjusted.
Setpoints for internal
transfer ribbon
rewinder